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39=-7w+5(w+7)
We move all terms to the left:
39-(-7w+5(w+7))=0
We calculate terms in parentheses: -(-7w+5(w+7)), so:We get rid of parentheses
-7w+5(w+7)
We multiply parentheses
-7w+5w+35
We add all the numbers together, and all the variables
-2w+35
Back to the equation:
-(-2w+35)
2w-35+39=0
We add all the numbers together, and all the variables
2w+4=0
We move all terms containing w to the left, all other terms to the right
2w=-4
w=-4/2
w=-2
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